The show illustrates the development of the city's architecture over time through 72 watercolour sketches, supplemented by brief explanatory notes.

Today's city is a complex place, influenced by its site, available materials and local traditions, yet displays influences from ideas across the world. It is a city with places of great beauty, and a robust character making it a city to be proud of.

The exhibition, which was first launched at The Playhouse in June last year, now returns until Friday April 11.

All paintings for sale with donations to the Simon Community Northern Ireland.

The accompanying book, MARKS OF TIME, published by Guildhall Press (Derry), is on sale from all local bookshops.